Add missing semicolon

plugin/speakernotes/client.js

@@ -6,7 +6,7 @@
 	var socketId = Math.random().toString().slice(2);
 	
 	console.log('View slide notes at ' + window.location.origin + '/notes/' + socketId);
-	window.open(window.location.origin + '/notes/' + socketId, 'notes-' + socketId)
+	window.open(window.location.origin + '/notes/' + socketId, 'notes-' + socketId);
 
 	Reveal.addEventListener( 'slidechanged', function( event ) {
 		var nextindexh;